Nut-lock.



No. 858.889. y PATENTED JULY 2, 1907.

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Br Troni/Els UNITE STATES MONTFORD P. MORRISON OF ATLANTA, GEORGIA.

NUT-LOCK No. 858,889. specification of Letters Patent. Patented July 2, 1907.

Application filed January '1, 1907. Serial No. 351.053.

To all whom it may concern:

Be it known that I, MONTFORD P. MORRISON, a citikzen of the United States, and residing at Atlanta, in

the county o f Fulton and State of Georgia, have invented certain new and useful Improvements in Nut- Locks, of -which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same. f

This invention relates to nut locks, and the object thereof is to provide an improved deviceof this class which may be used in connection with railway rail couplings and fish plates, or in connectionl with any kind or class of machinery where such devices are required. 4 f 4 The invention is fully disclosed in the following specication, of which-l the accompanying drawing forms a part, in which the'separate parts of my improvement are designated lby suitable reference characters in each of the'views, and in which;-

Figure l is a sectional side view of the end portion of a bolt provided with a nut and showing my improved nut lock; Fig. 2 a side view of the bolt; Fig. 3 an end view thereof; Fig. 4 a side view of a spring lock which I employ; Fig. 5 an end view of a bolt and face v'iew of a nut; and, Fig. 6 a transverse section of the nutL In the drawing forming :part of this specification, I have shown at a an ordinary bolt one end of which is screw-threaded asshown at a2, and in the practice of my invention, I form in the threaded portion of the bolt a plurality of deep longitudinal grooves a3, said grooves, in the form of construction shown, -being five in number and being therefor separated byl about seventy-two degrees of a circle. I also provide a nuty b which is threaded interiorly as shown at b? to correspond with the threadon the bolt a, and the threads b2 .of the,I nut b are provided with`v deep transverse grooves b3 which correspond with the grooves a3 of the bolt a, and/which are also arranged in parallel rows' which are preferably six in number and equally spaced f `as clearly shown in the drawing,`andby`reason of thi'sI `shown inthe drawing, one of the' grooves in thel nutf may be made to register withcne of the grooves in thei lbolt` thirty times during a single complete rotation of thenut,'.'and it will thus be seen that onlyxa sl-ighttr of the nut is necessary at anytime to bring onelf'the. grooves thereininto position to register with one of facilitates the operation-Of my improved nut lock and renders the same more practical and useful under all conditions, and itv will be apparent that the greater number of grooves may be formed in the bolt if desired.

The grooves b`3 in the threads of the nut b do not extend through the inner or back thread of the said nut as is clearly shown in Figs. 1 and 6, and in practice, I also provide a spring key c composed of.a strip of spring metal folded upon itself to form two separate arms, One'of which is longer than the other and provided with a U-shaped head`c2. The' shape or form of the end of the spring key c opposite the head cV2 is shown at c3 and thel length of the shorter arm of the spring key c is such that whenthe arms of said device are forced together, they will lie parallel and flush, and the end of the shorter arm will abut against the U-shaped head c2 and at the .end of the longer arm adjacent to the .U-shaped head c2 is a projecting prong c4 adapted to 'enter corresponding recesses b4 formed in the grooves `b3 which cut the threads of said nut and 4adjacent to the outer face of said nut.

In the-use of this device, the nut is screwed onto the bolt in the usual manner and is turned so that one of the grooves b3 in the threads of the nut will register with one of the grooves a3 inthe threads of the bolt as clearly shown at a4 in Fig. 5. The spring locking device c is then driven into the registering grooves b3-and a3 as shown in Fig. 1, until the prong c4 enters the correspondiifg recess b4 as is also show nl in said figure and the rmt will be securelylocked in place and cannot be Aturned in either direction until the spring keyis detached or taken out. 'The object of providing a plurality of the grooves a3, in the threads of the bolt and' a plurality of the grooves b3 in the threads of the nut is to provide means-whereby at least two of said grooves may be conveniently made to register when the nut is `fully screwed 'onto the bolt, and it will be apparent that any desired number of these grooves in the threads of the nut and bolt may be employed. The nature vor form of the Vthreads,l the size of the bolt and nut, and? `the use towhich said-parts are devoted` are alllimma- ,terijaL and various changes in and modificationsof the vvarious features of they construction herein described may be made Without ,departing from` the spirit ofrny invention or sacriicingits advantages, `and I reserve the right to make all such alterations therein as fairly rf'comewithin the scope of the invention.

' vIt will'be observed that the grooves b3 in the threads of the nut do not cut or pass through the inner thread of lthelnut or the thread adjacent to the inner face of thenut, the object ofthis construction being to limit ,tle'ertent lto which the' spring locking key cfcan be loo driven into position and the length of the said spring key is such that no care is necessary in driving it into the grooves in the bolt, and this, as will b e understood;

inward movement and the prong c4 is also' sprung into the corresponding recess b4 when the spring key is driven into position as shown in Fig. l.

I am aware that threaded bolts and threaded nuts have heretofore been provided with grooves which eut the threads ,and in which keys of different forms have been inserted in order to prevent the nut from turning, lout the novel features of'my invention involving the form, construction and operation of the spring locking key c and the recesses bin the nut'have never heretofore accordingto my information been employed.

Having fully described my invention, what I claim as'new and desire to secureby Letters Patent, is:-

1. A threaded bolt previdedwith a.Y correspondingly threaded nt, the threads of t-he bolt being cut by transverse grooves, andthe threads 4oi? the nut being also cut by transverse grooves, one of the grooves in the threads of the nut being adapted to be made to register with one' of the grooves in the threads of the bolt, and said groovesl in the nutvbein'gprovided near their outer end With'recesses, and-a folded spring key adapted to bedri'ven finto said grooves when vin,` a" registering` position and one part of which is provided at its outer end with a prong adapted to enter the recess `in the corresponding groove in the nut.

2. A threaded boit provided with a correspondingly threaded n ut, the threads ofthe bolt being cutby deep transverse grooves, the threads of the nut, excepththe inner thread, being also, cut bydeep transverse grooves. one of the grooves in the threads of4 the nut being adapted to be 'made to register with one-of the grooves in the. threads of the boit, andthe grooves in' the threads of the, nut being provided adjacent'to their outer ends with recesses, and a folded spring key adapted to be driven into eases@ said grooves when in a registering position and one of the parts of which is provided at its outer end with n prong adapted to enter the corresponding recess in the correspending groove in the threads of the nut,

4 3. A threaded bolt provided with a correspondingly threaded nut, the threads of lthe bolt being cut by deep transverse groovesp the threads of the nut, except the innerV ad, being also cut by deep transverse groovesy one .the grooves in the threads of 'the nut being adapted to -be made toA register with one of the grooves in the threads of the bolt, and the grooves in the threads of the nut being provided adjacent to the outer face of said nut i with recesses, and a folded spring key adapted to be driven into said grooves when in :1 registering position andy provided at its outer end with a prong adapted to enter the corresponding recess in the corresponding groove in the threads of the nut.

4. A threaded bolt provided with a correspondingly threaded nut, the threads of the bolt and nut being cut by transverse grooves, one of the grooves in the threads of the nut being adapted to be made to register with one of the grooves in the threads of the bolt, said grooves in the nut being provided 'witl recesses between the opposite sides of said nut, and a folded spring key adapted to be driven into said grooves when in a registering position and provided with a prong adapted to enter the recess in the lcorresponding groove in the nut.

In testimony that I claim the foregoing as my invenvtion I have signed my name in presence of the subscrib- Witnesses:

ALBERT W. Gines, C. E. MULBEANY. 

